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<div class="title">/data/users/hoss/faiss/IndexBinaryFlat.h</div>  </div>
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<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) Facebook, Inc. and its affiliates.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * This source code is licensed under the MIT license found in the</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;</div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">// -*- c++ -*-</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#ifndef INDEX_BINARY_FLAT_H</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define INDEX_BINARY_FLAT_H</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor">#include &quot;IndexBinary.h&quot;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="keyword">namespace </span>faiss {</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment">/** Index that stores the full vectors and performs exhaustive search. */</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexBinaryFlat.html">   21</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1IndexBinaryFlat.html">IndexBinaryFlat</a> : <a class="code" href="structfaiss_1_1IndexBinary.html">IndexBinary</a> {<span class="comment"></span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="comment">  /// database vectors, size ntotal * d / 8</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexBinaryFlat.html#afc0b5b076b35a1a1889b0012848c795c">   23</a></span>&#160;<span class="comment"></span>  std::vector&lt;uint8_t&gt; <a class="code" href="structfaiss_1_1IndexBinaryFlat.html#afc0b5b076b35a1a1889b0012848c795c">xb</a>;</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="comment">  /** Select between using a heap or counting to select the k smallest values</span></div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="comment">   * when scanning inverted lists.</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment">   */</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="structfaiss_1_1IndexBinaryFlat.html#a9fa80e22a4accee4da0ee152a4910c1b">   28</a></span>&#160;  <span class="keywordtype">bool</span> <a class="code" href="structfaiss_1_1IndexBinaryFlat.html#a9fa80e22a4accee4da0ee152a4910c1b">use_heap</a> = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;  <span class="keywordtype">size_t</span> query_batch_size = 32;</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;  <span class="keyword">explicit</span> <a class="code" href="structfaiss_1_1IndexBinaryFlat.html">IndexBinaryFlat</a>(<a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> <a class="code" href="structfaiss_1_1IndexBinary.html#a0e485a7189eec2675032486d3b12cf88">d</a>);</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;  <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexBinaryFlat.html#ad2e6f7d9e4672caff89b6045cd2a808a">add</a>(<a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> n, <span class="keyword">const</span> uint8_t *x) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;  <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexBinaryFlat.html#a1765bac1dad81f86e226446483b5470e">reset</a>() <span class="keyword">override</span>;</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;  <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexBinaryFlat.html#a473e35ebabadc79869ca89f987553b13">search</a>(<a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> n, <span class="keyword">const</span> uint8_t *x, <a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> k,</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;              int32_t *distances, <a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> *labels) <span class="keyword">const override</span>;</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;  <span class="keywordtype">void</span> <a class="code" href="structfaiss_1_1IndexBinaryFlat.html#a65c83fa2f2740fc17089e63dc7b70076">reconstruct</a>(<a class="code" href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">idx_t</a> key, uint8_t *recons) <span class="keyword">const override</span>;</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="comment">  /** Remove some ids. Note that because of the indexing structure,</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="comment">   * the semantics of this operation are different from the usual ones:</span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="comment">   * the new ids are shifted. */</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;  <span class="keywordtype">long</span> <a class="code" href="structfaiss_1_1IndexBinaryFlat.html#aabfbe7b0938f28a3eefeeedea4b7b545">remove_ids</a>(<span class="keyword">const</span> <a class="code" href="structfaiss_1_1IDSelector.html">IDSelector</a>&amp; sel) <span class="keyword">override</span>;</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;  <a class="code" href="structfaiss_1_1IndexBinaryFlat.html">IndexBinaryFlat</a>() {}</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;};</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;}  <span class="comment">// namespace faiss</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="preprocessor">#endif  // INDEX_BINARY_FLAT_H</span></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFlat_html"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFlat.html">faiss::IndexBinaryFlat</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFlat_8h_source.html#l00021">IndexBinaryFlat.h:21</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFlat_html_ad2e6f7d9e4672caff89b6045cd2a808a"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFlat.html#ad2e6f7d9e4672caff89b6045cd2a808a">faiss::IndexBinaryFlat::add</a></div><div class="ttdeci">void add(idx_t n, const uint8_t *x) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFlat_8cpp_source.html#l00024">IndexBinaryFlat.cpp:24</a></div></div>
<div class="ttc" id="structfaiss_1_1IDSelector_html"><div class="ttname"><a href="structfaiss_1_1IDSelector.html">faiss::IDSelector</a></div><div class="ttdef"><b>Definition:</b> <a href="AuxIndexStructures_8h_source.html#l00054">AuxIndexStructures.h:54</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFlat_html_aabfbe7b0938f28a3eefeeedea4b7b545"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFlat.html#aabfbe7b0938f28a3eefeeedea4b7b545">faiss::IndexBinaryFlat::remove_ids</a></div><div class="ttdeci">long remove_ids(const IDSelector &amp;sel) override</div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFlat_8cpp_source.html#l00058">IndexBinaryFlat.cpp:58</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFlat_html_a473e35ebabadc79869ca89f987553b13"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFlat.html#a473e35ebabadc79869ca89f987553b13">faiss::IndexBinaryFlat::search</a></div><div class="ttdeci">void search(idx_t n, const uint8_t *x, idx_t k, int32_t *distances, idx_t *labels) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFlat_8cpp_source.html#l00034">IndexBinaryFlat.cpp:34</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFlat_html_a65c83fa2f2740fc17089e63dc7b70076"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFlat.html#a65c83fa2f2740fc17089e63dc7b70076">faiss::IndexBinaryFlat::reconstruct</a></div><div class="ttdeci">void reconstruct(idx_t key, uint8_t *recons) const override</div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFlat_8cpp_source.html#l00078">IndexBinaryFlat.cpp:78</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinary_html_a01749bbdbd3b7ec6bb9390257ab16c5c"><div class="ttname"><a href="structfaiss_1_1IndexBinary.html#a01749bbdbd3b7ec6bb9390257ab16c5c">faiss::IndexBinary::idx_t</a></div><div class="ttdeci">Index::idx_t idx_t</div><div class="ttdoc">all indices are this type </div><div class="ttdef"><b>Definition:</b> <a href="IndexBinary_8h_source.html#l00037">IndexBinary.h:37</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinary_html_a0e485a7189eec2675032486d3b12cf88"><div class="ttname"><a href="structfaiss_1_1IndexBinary.html#a0e485a7189eec2675032486d3b12cf88">faiss::IndexBinary::d</a></div><div class="ttdeci">int d</div><div class="ttdoc">vector dimension </div><div class="ttdef"><b>Definition:</b> <a href="IndexBinary_8h_source.html#l00041">IndexBinary.h:41</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFlat_html_a9fa80e22a4accee4da0ee152a4910c1b"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFlat.html#a9fa80e22a4accee4da0ee152a4910c1b">faiss::IndexBinaryFlat::use_heap</a></div><div class="ttdeci">bool use_heap</div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFlat_8h_source.html#l00028">IndexBinaryFlat.h:28</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFlat_html_a1765bac1dad81f86e226446483b5470e"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFlat.html#a1765bac1dad81f86e226446483b5470e">faiss::IndexBinaryFlat::reset</a></div><div class="ttdeci">void reset() override</div><div class="ttdoc">Removes all elements from the database. </div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFlat_8cpp_source.html#l00029">IndexBinaryFlat.cpp:29</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinaryFlat_html_afc0b5b076b35a1a1889b0012848c795c"><div class="ttname"><a href="structfaiss_1_1IndexBinaryFlat.html#afc0b5b076b35a1a1889b0012848c795c">faiss::IndexBinaryFlat::xb</a></div><div class="ttdeci">std::vector&lt; uint8_t &gt; xb</div><div class="ttdoc">database vectors, size ntotal * d / 8 </div><div class="ttdef"><b>Definition:</b> <a href="IndexBinaryFlat_8h_source.html#l00023">IndexBinaryFlat.h:23</a></div></div>
<div class="ttc" id="structfaiss_1_1IndexBinary_html"><div class="ttname"><a href="structfaiss_1_1IndexBinary.html">faiss::IndexBinary</a></div><div class="ttdef"><b>Definition:</b> <a href="IndexBinary_8h_source.html#l00036">IndexBinary.h:36</a></div></div>
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